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High-resolution dating of Co-rich crusts: A comparative study using the methods of orbital pacing and ~(230)Th_(ex)/~(232)Th dating |
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| Authors: | HAN XiQiu QIU ZhongYan MA WeiLin & QIAN JiangChu Key Laboratory of Submarine Geosciences State Oceanic Administration Hangzhou China Second Institute of Oceanography |
| Affiliation: | HAN XiQiu1,2,QIU ZhongYan1,3,MA WeiLin1,2 & QIAN JiangChu1,2 1 Key Laboratory of Submarine Geosciences,State Oceanic Administration,Hangzhou 310012,China,2 Second Institute of Oceanography,3 Department of Earth Sciences,Zhejiang University,Hangzhou 310027 |
| Abstract: | Due to their slow growth rates, seamount Co-rich crusts are very difficult to date with high resolution and precision. This paper is to test the use of orbital pacing on the growth profile of crusts to determine high-resolution age and growth rate. Crust CB14 from the central Pacific Ocean was selected for this study. We first examined the growth pattern in detail under a reflected-light microscope and ascertained that the growth environment was stable for the sub-layer 1 (0-3 mm). We then used electron mic... |
| Keywords: | seamount Co-rich crust Milankovitch cycles 230Thex/232Th dating growth rates of Mn-crusts central Pacific Ocean |
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